<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" boder stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
              <el-row
                :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']"
                v-for="(item1, i1) in scope.row.children"
                :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag
                  closable
                  @close="remove3ByID(scope.row,item1.id)"
                  >{{ item1.authName }}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <el-row :class="[i2 === 0? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success"
                      closable
                      @close="remove3ByID(scope.row,item2.id)"
                      >{{ item2.authName }}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                        <el-tag
                        type="warning"
                        v-for="(item3,) in item2.children"
                        :key="item3.id"
                        closable
                        @close="remove3ByID(scope.row,item3.id)"
                        >
                        {{item3.authName}}
                        </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <div>
              <el-button type="primary" icon="el-icon-edit" size="mini"
                >编辑</el-button
              >
              <el-button type="danger" icon="el-icon-delete" size="mini"
                >删除</el-button
              >
              <el-button
              type="warning"
              icon="el-icon-search"
              size="mini"
              @click="showSet(scope.row)"
                >分配权限</el-button
              >
            </div>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRights"
  width="50%"
  @close="setDialogClose"
  >
  <!-- 树型组件 -->
  <el-tree
  :data="rightslist"
  :props="treeProps"
  show-checkbox
  node-key="id"
  default-expand-all
  :default-checked-keys="defkeys"
  ref="treeRef"
  ></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRights = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      rolesList: [],
      //   控制对话框显示隐藏
      setRights: false,
      //   所有权限的数据
      rightslist: [],
      //   树形组件的绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //   默认选中节点
      defkeys: [],
      //   修改权限的id
      roleId: []
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    //   获取所有角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色失败')
      }
      this.rolesList = res.data
    },
    // 根据id删除对应标签
    async remove3ByID (role, rightID) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightID}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSet (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色失败')
      }
      //   获取到的权限数据
      this.rightslist = res.data
      this.getLeafKeys(role, this.defkeys)

      this.setRights = true
    },
    // 获取三级权限id
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr)
      )
    },
    // 监听对话框关闭
    setDialogClose () {
      this.defkeys = []
    },
    // 分配权限确认
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('修改失败')
      }
      this.$message.success('修改成功')
      this.getRolesList()
      this.setRights = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>
